Pediatric CCRN Exam Pediatric CCRN Renal 2

Question 1

When calculating percent fluid overload in a PICU patient, which formula is correct?

Accepted Answer

(Current weight − admission weight) / admission weight × 100

Answer

Percent fluid overload = (current weight − admission weight) / admission weight × 100, using the admission weight as the baseline denominator.

Question 2

A 10-year-old with rhabdomyolysis is at high risk for AKI. Which intervention is MOST important to prevent renal tubular damage?

Accepted Answer

Aggressive IV fluid resuscitation targeting urine output ≥ 3 mL/kg/hr

Answer

Aggressive IV hydration dilutes myoglobin and maintains high urine output, flushing nephrotoxic myoglobin from renal tubules before it can cause tubular necrosis.

Question 3

Which electrolyte profile is the hallmark of tumor lysis syndrome in pediatric oncology patients?

Accepted Answer

Hypocalcemia, hyperphosphatemia, hyperkalemia, and hyperuricemia

Answer

Tumor lysis syndrome results from rapid cell death releasing intracellular contents, causing hyperkalemia, hyperphosphatemia, hyperuricemia, and secondary hypocalcemia.

Question 4

Which laboratory finding would BEST suggest a pre-renal cause (rather than intrinsic renal) of AKI in a child?

Accepted Answer

FeNa < 1%, urine sodium < 20 mEq/L

Answer

In pre-renal AKI, intact tubular function allows the kidney to avidly retain sodium (urine Na < 20 mEq/L) and concentrate urine (FeNa < 1%) in response to decreased perfusion.

Question 5

A pediatric patient develops sudden headache, nausea, vomiting, and altered mental status during hemodialysis. What complication is most likely?

Accepted Answer

Dialysis disequilibrium syndrome

Answer

Dialysis disequilibrium syndrome results from rapid osmolality shifts causing cerebral edema, occurring most often in new or high-BUN patients undergoing their first dialysis sessions.

Pediatric CCRN Exam Practice Test

Pediatric CCRN Exam Practice Test

Pediatric CCRN Exam Pediatric CCRN Renal 2